节水灌溉条件下水稻气孔导度模型的改进

为了研究节水灌溉条件下水稻叶片气孔导度与相关因子的响应关系模型，于2006年在河海大学国家重点实验室昆山试验研究基地进行了田间试验。根据实测资料分析了水稻气孔导度与各影响因子的响应关系，引入了水稻叶片叶气温差改进了气孔导度模型，并对两类气孔导度改进模型进行了比较。结果表明：改进的气孔导度模型在节水灌溉条件下具有更高的模拟解释能力；基于Jarvis模型改进的气孔导度模型比Leuning-Ball改进模型具有更好的模拟效果。推荐Jarvis改进气孔导度模型作为节水灌溉条件下的水稻叶片气孔导度响应模型。

Improvement of stomatal conductance models of rice under water saving irrigation treatment

In order to investigate the response relation model of stomatal conductance of rice leaves and related factors under water saving irrigation treatment, the field experiment was conducted in Kunshan experimental station of the State Key Laboratory of Hohai University in 2006. According to the observed data, the response relation of different factors and stomatal conductance of rice was analyzed. Leaf-air temperature difference was introduced to improve the original models, and two types of representative models were compared as well. The results indicated that the improved model taken into account of leaf-air temperature difference under the water saving irrigation condition had superior interpretive simulation ability than the original one. The improved stomatal conductance model by Jarvis had better simulation results than the one improved by Leuning-Ball. The improved Jarvis stomatal conductance model is recommended under water saving irrigation treatment.